Wrong tan number entered in itr

u can revise your return...

please revise ur return  as soon as possible before assessment.

Which Section number I need to mention in - "return filed under section"

Another change is to mention return "Revised" and fill the ack. no. and date.

any other change I need to do, please guide.

revise return u/s 139(5)

Even if your 26AS is proper, your AO will not give you credit if your TAN no is wrong. So file revised return.